There are engineers pushing the limits of design and the programmers poring over lines of code.
Where the newly-naturalized scientist who is leading technological breakthroughs can afford to keep pushing the limits of our knowledge.
Mr Ibarretxe, a nationalist, is pushing the limits of devolution and seeking votes in the regional election due this autumn.
They idolize pop artists that harness the latest technologies and trends, pushing the limits of music and movies and art and gaming.
The addition of facial expression tracking will be interesting to follow, especially to modders who have been pushing the limits of what Kinect can do.
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While I don't buy the argument that we have a housing bubble, I do believe prices are inflated and are pushing the limits of affordability.
Fluffing a company, pushing the limits of regulations, hyping the public are time-tested roads to fast money, though of course they contribute nothing in terms of value creation.
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With console blockbusters like Call of Duty already pushing the limits of what can be expected out of a traditional title, it seems like Facebook and Smartphones are the areas for biggest growth in the industry.
But the fact remains that we're witnessing two men who are pushing the limits of their sport two superstars who, technically and stylistically, are very much the product of this era yet somehow manage to transcend it, too.
When people are mindful of balancing skill and challenge so that cooking, or shopping, is neither so easy as to be a boring chore nor so hard as to be an anxious-making annoyance pushing the limits of competence and time then enjoyment can be found and increased.
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But what happens when visitors to Web 2.0 sites start pushing the legal limits of free speech?
The FSA's chairman, Lord Turner, saw this problem as "a cultural tendency to be always pushing" the limits of the rules.
However, he also trains harder than anyone else, pushing himself to the limits of human ability.
Only by pushing mankind to its limits, to the bottoms of the ocean and into space, will we make discoveries in science and technology that can be adapted to improve life on Earth.
Others revelled in the challenge of pushing old technology to its limits.
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However, by spending time and energy aggressively pursuing marginal matters or pushing the law to its limits for weak cases, regulators run the risk of missing the boat on better cases that could benefit from additional attention.
It seems EchoStar has made a practice out of disobeying court orders and pushing the legal system to the limits.
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